Invader is the nom de guerre of a ceramic graffiti artist who has been installing ceramic tiles with pixilated designs on the walls of cities around the world since the 1990s.
According to Wikipedia, “Invader sees himself as a ‘hacker’ of public space spreading a mosaic ‘virus’. He believes that museums and galleries are not accessible to everyone, and so installs his work at street level for ordinary people to enjoy…”
Invader originally targeted the walls of Paris, then moved on to other French cities, and from there he launched “invasions” of other cities: New York, Hong Kong, Los Angeles, and others. A “FlashInvaders” app maps the location of Invader’s installations. App users are encouraged to search out and photograph the ceramic installations, which are tucked away in nooks and crannies or non-descript building walls. At the time of writing, there are 3,997 invaders in 79 cities, mostly in Europe.
Invader tile installations have become valuable collector items, with pieces selling in galleries for $250,000 or more.